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-3=-1/3a
We move all terms to the left:
-3-(-1/3a)=0
Domain of the equation: 3a)!=0We get rid of parentheses
a!=0/1
a!=0
a∈R
1/3a-3=0
We multiply all the terms by the denominator
-3*3a+1=0
Wy multiply elements
-9a+1=0
We move all terms containing a to the left, all other terms to the right
-9a=-1
a=-1/-9
a=1/9
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